/*选择器优先级*/
/*id>class>type*/
p {
    color: cyan;
    background-color: green;
    font-size: 20px;
    font-family: "黑体", serif;
    text-align: center;
}
.c1 {
   text-align: center;
    color: cornflowerblue;
}

#p1{
    color: cyan;
    background-color: #008075;
    font-size: 20px;
    font-family: "黑体", serif;
    text-align: center;
}